67868251 has 8 divisors (see below), whose sum is σ = 74348208. Its totient is φ = 61440000.

The previous prime is 67868237. The next prime is 67868287. The reversal of 67868251 is 15286876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 15-Lehmer number, since φ(67868251) divides (67868251-1)¹⁵.

It is a cyclic number.

It is not a de Polignac number, because 67868251 - 2⁵ = 67868219 is a prime.

It is a deceptive number, since it divides R_67868250.

It is a junction number, because it is equal to n+sod(n) for n = 67868198 and 67868207.

It is not an unprimeable number, because it can be changed into a prime (67868201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10150 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (9293526).

Almost surely, 2^67868251 is an apocalyptic number.

67868251 is a deficient number, since it is larger than the sum of its proper divisors (6479957).

67868251 is a wasteful number, since it uses less digits than its factorization.

67868251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25853.

The product of its digits is 161280, while the sum is 43.

The square root of 67868251 is about 8238.2189215874. The cubic root of 67868251 is about 407.9017348735.

The spelling of 67868251 in words is "sixty-seven million, eight hundred sixty-eight thousand, two hundred fifty-one".